Paving-block



3. ALB INK'.

HLED OCT- 21. I919.

H. BICHAN AND W.

PAVING 8L0 APPLICATION Patented Jan. 4, 1921.

.H E o UNITED STATES PATENT OFFICE.

PAVING-BLOCK.

Specification of Letters Patent.

Patented Jan. 4, 19.21.

Application filed (Mother 27, 1919. Serial No. 333,630.

To all whom it may concern Be it known that we, HERBERT BIQHAN and WILLIS S. ALBRINK, citizens of the United States, and residents of Toledo, in the county of Lucas and State of ()hio, have invented certain new and useful Paving- Blocks; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates particularly to paving blocks of wood or other material which is subject to contraction and expansion under changing temperature or moisture conditions.

The primary object of our invention is the provision on blocks, of the character described, of simpleand efficient means for of fectinp a suitable spacing of the blocks when laid to form a floor or pavement, and which will at the same time compress under pressure, thereby preventing a buckling of the floor or pavement when expansion occurs, and will expand to normal size, or substantially so, when the compressing pressure is relieved. Further objects and advantages of the invention will be apparent from the following detailed description thereof.

While the invention in its broader aspect is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings, in Which,-

Figure 1 is a perspective view of a portion of a pavement employing blocks embodying the invention. Fig. 2 is an enlarged perspective view of one of the blocks, and Fig. 3 is a section thereof on the line 8-3 in Fig. 2.

Referring to the drawings, the paving blocks embodying the invention are desig nated 1, and each is provided, in the present instance, on one vertical side and an end thereof with projecting members 2 which, when a plurality of blocks are placed side by side and end to end, form a spa ing for the blocks so as to permit tar or other suitable filler to be placed in the cracks or spaces between the blocks.

In the present embodiment of the invention, the spacing members 2 are of lug form, a pair being provided in vertically spaced relation at each end portion of a side of the block and a similar pair being provided on an end of the block, thus enabling the filler between the blocks to fill in around and between the spacing members and thereby more effectually bind the blocks together and against a raising action than is possible in spacing members of the vertical rib type commonly employed. It is also found in practice that this arrangement of the spacing members or lugs prevents water or mois ture from working down between the blocks and underneath the same and resulting in a raising of the blocks by reason of the presence of water thereunder. It is also found in ractice that the presence of floaters in a pavement being laid, are very largely eliminated. In the laying of block pavements the tar or filler, unless considerable care is taken in the laying of the blocks, works under the blocks and causes a raising thereof and the blocks raised in this manner are termed floaters.

The spacing members 2 are composed of a material different from the block itself and this material preferably comprises a bitumen expansion joint materialor asphalt expansion joint material, which is of a resilient nature. These materials contain a fibrous material in a greater or less quantity. and in practice an expansion joint material employing fiber board soaked in a suitable preservative, such for instance as creosote or any bituminous or asphalt solution is preferablyemployed. A spacing means of this character has suflicient give and expansion to permit it to compress under the expansion action of the blocks and to cause it to again expand to its normal state, or substantially so, when the compressing pressure is relieved.

The lugs or spacing members 2 may be ap plied to the blocks in any suitable manner, as for instance by the use of a suitable adhesive or by the use of a tack or brad, the head of which is counter-sunk or driven such a distance into the member as not to interfere with the compression thereof.

lVe wish it understood that our invention is not limited to any specific construction, arrangement or form of the parts, or to the use of any particular material, as it is capable of numerous modifications and changes without departing from the spirit of the claims.

Having thus described our invention, What members of fibrous expansion joint mate- 10 We claim as new, and desire to secure by rial attachedthereto in spaced relation on Letters Patent, is the same side of the block to permita bind- 1. A paving block having spacing lugs ing material disposed between adjoining I 5 of fibrous expansion joint material attached blocks to encircle each spacing member.

thereto adjacent to the upper and lower In testimony whereof we have hereunto 15 edges thereof and in spaced relation on the signed our names to this specification. same side of the block. HERBERT BICHAN.

2. A wood paving block having spacing WILLIS S. .ALBRINK. 

